Add attachments (#733)

* Add attachments v1

* Refacto

* Add Policy checks

* Fix tests

* Remove generated files from git

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

server/src/core/attachment/resolvers/attachment.resolver.ts

@@ -0,0 +1,65 @@
+import { Resolver, Args, Mutation } from '@nestjs/graphql';
+import { User, Workspace } from '@prisma/client';
+import { GraphQLUpload, FileUpload } from 'graphql-upload';
+import { AuthUser } from 'src/decorators/auth-user.decorator';
+import { AuthWorkspace } from 'src/decorators/auth-workspace.decorator';
+import { streamToBuffer } from 'src/utils/stream-to-buffer';
+import { v4 as uuidV4 } from 'uuid';
+import { AttachmentService } from '../services/attachment.service';
+import { FileUploadService } from 'src/core/file/services/file-upload.service';
+import { FileFolder } from 'src/core/file/interfaces/file-folder.interface';
+import { UseGuards } from '@nestjs/common';
+import { JwtAuthGuard } from 'src/guards/jwt.auth.guard';
+import { Attachment } from 'src/core/@generated/attachment/attachment.model';
+import { AbilityGuard } from 'src/guards/ability.guard';
+import { CreateAttachmentAbilityHandler } from 'src/ability/handlers/attachment.ability-handler';
+import { CheckAbilities } from 'src/decorators/check-abilities.decorator';
+
+@UseGuards(JwtAuthGuard)
+@Resolver(() => Attachment)
+@Resolver()
+export class AttachmentResolver {
+  constructor(
+    private readonly fileUploadService: FileUploadService,
+    private readonly attachmentService: AttachmentService,
+  ) {}
+
+  @UseGuards(AbilityGuard)
+  @CheckAbilities(CreateAttachmentAbilityHandler)
+  @Mutation(() => String)
+  async uploadAttachment(
+    @AuthUser() user: User,
+    @AuthWorkspace() workspace: Workspace,
+    @Args('activityId') activityId: string,
+    @Args({ name: 'file', type: () => GraphQLUpload })
+    { createReadStream, filename, mimetype }: FileUpload,
+  ): Promise<string> {
+    const stream = createReadStream();
+    const buffer = await streamToBuffer(stream);
+
+    const { path } = await this.fileUploadService.uploadFile({
+      file: buffer,
+      filename,
+      mimeType: mimetype,
+      fileFolder: FileFolder.Attachment,
+    });
+
+    await this.attachmentService.create({
+      data: {
+        id: uuidV4(),
+        fullPath: path,
+        type: this.attachmentService.getFileTypeFromFileName(filename),
+        name: filename,
+        activityId: activityId,
+        authorId: user.id,
+        workspaceId: workspace.id,
+      },
+      select: {
+        id: true,
+        fullPath: true,
+      },
+    });
+
+    return path;
+  }
+}